Pulverizer feeder with magnetic separator



March 23 1926. 1,578,006

- J. E. BROWN ET AL PULVERIZER FEEDER WITH MAGNET IC SEPARATOR ed Jan. 5. 192'sv 4 Sheets-Sheet 1 Cway zcfk fayzar" J. E. BROWN ET AL PULVERIZER FEEDER WITH MAGNETIC S EPARATOR March 23 19.26.

Filed Jan.

5. 1925 4 Sheets-Sheet 2 March 23 1926.

J. E. BROWN ET AL PULVERIZER FEEDER WITH MAGNETIC SEPARATOR Filed Jan. 5, 1925 4 Sheets-Sheet :3

March 23 1926.

J. E. BROWN ET AL PULVERIZER FEEDER WITH MAGNETIC SEPARATOR 1925 4 Sheets-Sheet 4 Filed Jan. 5, 3 l

Patented Mar. 23, 1926.

UNITED STATES- PATENT OFFICE.

JOSEPH E. BROWN, OF HARVEY, AND CLARENCE R. TAYLOR, OF CHICAGO, ILLINOIS, ASSIGNORS TO GRINDLE FUEL EQUIPMENT COMPANY, OF HARVEY, ILLINOIS, A

CORPORATION OF ILLINOIS.

v PULVERIZER FEEDER WITH MAGNETIC SEIBARATOR.

Application, filed .l'anuary 5, 1925, Serial No. 497.

To all whom it may concern:

Be it 'known that we, JOSEPH E. BROWN and CLARENCE R. TAYLOR, citizens of the United States, residing, respectively, at Harvey and Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Pulverizer Feeders with Magnetic Separators, of which the following is a specification.

This invention is of special use in the art of burning coal or other fuel in powdered form and relates especially to mechanism for interposition between a general source of more or less coarse fuel material and the pulverizing machine for breaking up that fuel into proper condition for use in pul verized fuel furnaces and the like.

The object of the invention is to provide mechanism of this closs adjustable to convey predetermined amounts of fuel material from the source to the pulverizer and equipped with mechanism for removing metal material from the fuel material so conveyed which might be injurious to the pulverizing machine.

The invention consists in mechanism for attaining the foregoing and other objects; which can be easily and cheaply made; which is satisfactory in use and is not readily liable to get out of order; and more particularly in means for accurately, selectively adjusting the amount of fuel material to be carried to the pulverizer and means for efficiently removing loose metal from the fuel material. v

The invention further consists in numerous features and details of construction which will be hereafter more fully set forth in the specification and claims.

Referring to the drawings in which like numerals designate the same parts throughout the several views:

Figure 1 is a side elevation, some parts being shown in section, of mechanism illustrating this invention in its preferred form. Figure 2 is a plan view, taken on the line 22 of Figure Figure 3 is an enlarged, vertical, sectional view taken on the line 33 of Figure 1.

Figure 4 is a detail of a spring mechanism on the line 4t-4 of Figure 3.

Figure 5 is a side elevation, some parts in section, on the line 55 of Figure 3.

Figure 6 is a detail plan view on the line 66 of Figure 5.

Figure 7 is a plan view on the line 77 of Figure 1. I

Figure 8 shows the magnet removed from the rest of the mechanism as seen from the line 8-8 of Figure 3.

In carrying out this invention, a suitable case 10, in the particular instance here illustrated, a rectangular box, is provided sus tained from any suitable support on uprights 12. Entering the top of case 10 is a relatively large tubular fuel chute'16, terminating, if desired, in a funnel 18 into which the coarse fuel material to be operated upon may be dumped. Closing the lower end of chute 16, rotatable on an axis coincident with that of the center of the chute is a wheel 20 which is the top ofa truncated of brass or other non-magnetic material. In the particular case here illustrated, the wheel and cone are made in separate parts secured together by any suitable means, as for instance, screws 24. The wheel 20 is of substantially the same diameter as the outside of the chute 16. The truncated cone 22 is as shown made sufficiently larger than the wheel so that any material coming out of the side of chute 16 through port 26, provided therein for the purpose, falls upon the upper end of the truncated cone 22 and, except for the action of the magnetic mechanism hereafter described, slides down the outer surface of the cone 22 into a discharge trough or chute 28. This chute passes through an outer wall of the case 10 but is so arranged that it has an edge 30 project'- ing sufliciently far underneath the cone 22 so that material passing down the outer surface of the cone toward the trough entrance will without question drop into it and be thus conducted to any point desired :in the particular use here intended, to the pulverizing machine. Wheel 20 is rigidly secured through its hub flange 32 and suitable bolts 34 to a vertically disposed shaft 36 journaled in a bearing 38 formed on the base of bottom 40 of case 10. Shaft 36 passes entirely through wheel 20 and has an end portion 42 entering chute 16 to a height substantially above the top of port 26.

Journaled on a suitably mounted post or pivot 44-, located at one side of port 26, is a horizontally swinging deflector blade 46 passing through said port 26 over the upper surface of wheel 20 so that its point 48 can, when the parts are in the positions of Figures 2 and 6, contact with the upper end 42 of shaft 36. This deflector blade to is rockable from the position shown. in Figures 2 and 6 in "a horizontal plane. in a clockwise direction until the POlDlJ 48 of the deflector blade approaches, if it does not actually.

contact with, the inner wall of chute 16 ad: jacent to the edge 50 of port 26. This defiector blade 46 is movable between these two positions by proper manipulation of a hand lever 52 manually manipulable from outside the machine and selectively lockable in different positions by means of a conventional segment 54: and. a locking pin 56 selectively insertable through the lever 52 and selected ones of holes 58 formed in the segment. When deflector blade 46 is in the position shown in Figure 2 and Figure 6, all material passing down chute 16 onto rotating wheel 20 will, as it comes into engagementwith the deflector blade be switched out through port 26 onto cone 22 and except as hereafter described, delivered into trough or passage 28. When deflector blade 46 is moved to one of its possible intermediate positions, only the circumferential portion of the material on wheel 20 between point 418 of the deflector blade 46 and port edge 50 will pass out through the port while all the rest of the material on the wheel 20 be tween blade point 48 and shaft end 42 will pass round and round the shaft and thus remain in the chute 16. From the foregoing it will be seen that by properly manipulat ing handle 52 and thus positioning deflector blade 26, the operator can accurately regulate the amount of material from chute l6 deliverechthrough port 26 over cone 22 to trough 28. I

Stationarily mounted inside of cone 22 on suitable uprights 60 rising from base 40 is a segmental pole pin 62, energizable' by a magnet coil 64. This pole pin 62 is of such a size and shape that when energized by electric current obtained from any suitable source not shown, passed through coil 64, the effective field of action 66 of the magnet extendsrthrough that portion of rotating cone 22 .which at the moment is below port 26 in chute 16 and in the path of travel of material from said port into trough 28, with the result that the action of this magnet attracts and holds onto the outer surface of the brass cone 22 any metal which is in the material then passing from port 26 to trough 28. The result of this action isthat the metal thus magnetically held on the surface of cone 22 is-carried by the cone crosswise of the path of material moving between port .26 and trough 28 to a point or zone 68 within case 10 to which the field of action 66 of the magnet does not extend, whereupon metal carried by the cone is released therefrom and falls bygravity to the bottom 4L0 of the case from which it can be removed at the will of the operator through a door 70 provided for the purpose. If desired, a scraper 72 contacting the surface of cone 22 may be provided at this point to insure all metal formerly carried by cone 22 leaving the surface of the cone at this point adjacent to door 70. From the foregoing, it will be seen that when the magnet core 62 is in operation and fuel materia passing from chute 16 to the trough 28, pure coal and other non-metallic material will pass without interruption from port 26 over cone 22 to trough 28 and that metallic particles will adhere to the cone and be transported in a circle until they'drop off into the case at point 68, as heretofore described, ready for removal through door 70.

.The shaft 36 and consequently wheel 20 and .cone 22 are driven in a clockwise direction as viewed in Figure 6 by mechanism in cluding a special speed regulating device. 'l he lower end of shaft 36 is journaled in a conventional step bearing 74:, mounted in a plate 76, rigidly secured across uprights 12 at a substantial distance below base 40 of case 10 so as to leave between the two an ample space for the installation of the mechanism just referred to. Immediately adjacent to the top of plate 76 and on one side of shaft 86 is the hub 78 of a segmental member 80 having near its outer edge a segmental slot 82 transvei'sable by a bolt 84 passing'through an adjusting lever 86, there being at the upper end of the bolt a spring actuated clamp 88 frictionally holding lever 86 in predetermined position engagement with the top of segment 80. 1

The end of lever 86 nearest to shaft 36 is rigidly secured by any suitable means. as, for instance, bolts 90, to a disc rotatably journaled on the hub ofjaratchet wheel 9i journaled upon shaft 36 and bearing upon hub 78 0f segment 80. Disc 82 carries at opposite sides of a given diameter segmental flange plates 96 of predetermined length, curved about the center of shaft 36. These plates 96, as shown in Figure 7, clear the teeth of ratchet wheel'94 but travel close enough to the teeth to prevent ratchet dogs 98meshing with teeth on wheel 94 which are covered by an adjacent flange plate 96. By loosening clamp 88 and swinging lever 86, bolt 84: traveling in slot- 82, the angular position of the guard flange plates 96 on the circumference of ratchet wheel 9i may be selectively adjusted within the'limits of the length of slot 82.

Ratchet dogs 97 and 98 are pivotally mounted on the outer ends of two oppositely disposed levers 100 and 102 journaled. on.

shaft 36, and so arranged and shaped that said dogs, except as interfered with by the flange plates 96, normally engage the teeth of ratchet wheel 94, being forced into such engagement with said teeth by any conventional spring mechanism as, for instance, the one designated 104 and shown in detail in Figure 4.

Pivoted to lever 100 at approximately the middle of its length is a connecting rod 106 and similarly pivoted tolever arm 102 is an identical connecting rod 108. The ends of these connecting rods, away from levers 100 and 102, are pivotally attached to crank pin 110 on a rotatable crank 112 carried by a suitably mounted worm wheel 114, meshing with a worm 116, conventionally driven through gearing 118, pulley 120 and belt 122 conveying power from a source outside the figures and not shown.

The result of the construction described is that when the power is rotating wheel 114 in a clockwise direction, as shown in Figure 7 and crank pin, 110 is initially in the position of that figure, ratchet dog 97 will during a half revolution of wheel 114 engage the ratchet teeth of Wheel 94 and drive the wheel while ratchet dog 98 clicks idly over the teeth of wheel 94 passing under it, and that on the next 180 of the revolution of wheel 114, ratchet 98 rigidly engages the teeth on wheel 94 and-drives it, while the teeth on the opposite side of said wheel click under ratchet 98, from which it is seen that when flange plates 96 do not interfere with the ratchet dogs 97 and 98, shaft 36 is given a continuous rotation. Whenever wheel 114 is rotated, the particular machine here shown is so designed that ratchet wheel 112 is driven by each dog 97 and 98 a distance of twelve teeth on wheel 94 per complete revolution of power wheel 114, and the movement thus produced in wheel 94 and consequently shaft 36 and finally in wheel 20 is'the maximum amount of rotation which can be given to wheel 20 and cone 22 per revolution of wheel 114.

When and if it is desired to give wheel 20 and cone 22 a shorter travel er revolution of wheel 114, the operator simply releases catch 88 and moves lever 86 so that flange plates 96 prevent ratchet dogs 97 and 98 from operatively engaging a given predetermined number of said twelve teeth on wheel 94. For instance, if the plates 96 are-adjusted so that on a given rotation of wheel 114, ratchet dogs 97 and 98 can only engage and operate upon six teeth on ratchet wheel 94, wheel 20 and attached parts will be given one-half as much. rotation in a given revolution of wheel 114 as is the case when the plates 96 are moved so that they do not interfere at all with the ratchet dogs. By moving the plates 96 to obstruct eleven out of twelve teeth possibly engaged by the dogs, wheel 20 will be rotated only onetwelfth of its full possible rotation.

By combining the adjustments possible through the driving v mechanism just described and by varying the angularity of deflector 46 as hertofore described, very fine gradations in the amount of fuel material entering through hopper 18 passed outthrough trough 28 may be effected.

Broadly speaking, chute 16, case 10 and trough 28 form one passage for material to be worked upon and they are so referred to in some of the claims.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent is:

1. In mechanism of the class described, a case, a chute extending downwardly into said case,said chute having a discharge port of limited width in the side thereof, a rotatable plate closing the lower end of said chute, and a deflector of substantially the same length as the width of said part pivoted at one end adjacent to one side of said port and swingable across said plate from a position in which it completely closes said port to other positions in which it varies the effective area of said port and deflects therethrough material deposited in said chute and traveling with said plate on the top thereof.

2. In mechanism of the class described, a case, a chute extending downwardly into said case, said chute having a discharge port of limited width in the side thereof, a rotatable plate closing the lower end of said chute, and a member of substantially the same length as the width of said port movable over said plate from a position in In witness whereof, we have hereunto sub-- scribed our names.

JOSEPH E. BROWN. CLARENCE R. TAYLOR. 

